Fastening device



1,625, 12 Aprll 19, 1927. C. c. JENSEN 6 FASTENING DEVICE Filed April 5,1926 @MM/Qn@ M//y @0, .,@a w @VL/7W 14%@ v y@ y 5;@(5

' the' construction aiiinniirier of Patented Apr. 19, 1927.

UNSI'TED S5111* ATE PATENT" o?F'FflcE.l.V

om c. JENSEN; oF

CHICAGO, rumors.

FAsiNiNo DEVICE.

, joint; l TheI paiffs 1952s." S'ial. Nb. 9927815'.

turned outwardly or fiiiged saine Width or slightly' iifaiiijwerconverge inwardly, shown, und the lead of the stuud-4rd dove-trillingtool forms grooves 32 :dong the inner edges of the sides of the mortise.As in my prior Patent No. siloS of irl-.ry lil, 1925, l preferablyvntlize these grooves 152 in joiningr the pzirts 2O :ind 2l together.

The generally channel oi- V-shnpcd iusiener members` 5 :ind 6 fornidove-tail tenons, which tenons rire adapted to be inserted cndii'iseinto the inort-ises 30 und tit snugljy thereinT one in erich O thepieces 2O und 2l. The (hinges l() engage in the grooves 2,32 when thelisiitfner parts are inserted in the mortiscs oi' the parts to be joinedtherebjy :ind bind the l'esteiier parts firmly therein. 'lhe str-.ips.it ot euch fastener member 5 :ind i3 extend Afrom the edges 25 and uponassembly these projecting); straps overlap, :is shown in Fig; 'l :ind Ilwith the projecting parts of euch set of straps extending into themortise of the other puri joined thereby und orminzeY 1i socket` 35(Fig. Q) into which the pin il is inserted to join the parts firmly undsecurely together und, at the saine time, permitting ready disjointingor knocking down of the sinne.

The pin ll muy be tapered :it 3G und liended zit und it muy be driveninto place with its tapered end first.. As it is inserted, it draws theparts 20 :ind 2l up tightly :ind securely together,` und by cooperationwith the overlapping straps of the two fastener pieces, joins the partssecurely together. To disjoint the parts, all that is necessary 1S toremove the pin 14. which may eliviiys be convenientlydone, for example,by ,gfriizspuwr the head thereof with s; suitable tool and pidling thepin out. .k

In use the interlocking of the straps or knuckles 1.6 posit-ions them toreceive the connecting pin let und the interlocking engagement of theknuckles holds. the two parts of the fast-ener firmly n gainst relativedisplacement long the pin lll. .The end of the pin may be tapered tofacilitate insertion und such fi taper may be utilized to draw thefastener parts and the boards or other parts joined ther-eb)lv togetherupon insertion of the pin. Any such drawing action muy of course beomitted or employed :is desired.

llllieie it, is desirable to finish the edgcs() (Fig. 3 of the pieces2.0 and 2l' from which edges t e fastening device is inserted, the outerend ot the fastening device muy be spaced inn'iirdlvv from snid edgeswhen completely inserted. :is shown at in Fig. 3. A suitable plug i3 otr. nnitcrnil corresponding, for exemple, to that of the pieces 2O and2l, muy be then inserted to cover the outer end of the joint.i und thisblug muy be removed in disconnecting or disjointing the piiits.

necting is substantially :is in the previous embodiment.

l do not intend to be limited to the precise details shown or described.

l claim:-

l. ln combination with :i pair of members to be joined7 said membershaving mortises in their meeting ends oi :i fastening device comprisingr:i piiir of fastening elements, one lixedly secured in euch mortise,seid fastening elements having interlocking knuckles concealed withinthe members to be joined und u pin inserted through said interlockingknuckles to join suid nicmbois land removzible from said knuckleswithout relative movement between sind members, siiid pin und knucklesco-operziting to hold said memheis against relative movement. Withoutndditioinil connections.

2. The combination with a pair of menibers to be joined, ot u fasteningdevice con` cealed within said members und comprising a pair offastening elements one secured in enc i of said members, said fasteningelements having interlocking knuckles concealed within said members undn sorted through siiid interlocking knuckles for rigidl)T 'oiningsaidmembers with their meeting en s in abutting engagement and withoutrelative movement between the members, siiid pin being also concealedYwithin said members.

3l The combination wthfapair ofmem; bers to be joined, of a: fasteningdevice-'conceiiled Within seid members and compris` ing' s. pair ofgenerally V-shnped fastening elements one secured in each of saidmembers, said tnstenimr elementshzwing tapered interlocking knucklesformed by the bases of the Vshnped .fastening elements, said knucklesbeing concealed Within Said meinbers and having dverging sides securedin dove-tail mortises in the meeting ends of the members to be joinedund a. pin inserted into seid interlockingr knuckles for joining seidmembers with their meeting ends in abutting engagement and withoutrelative movement between the members, said pin being also concealedWithinsaid members 4. In combination with a pair of members to bejoined, Said members having inortises in their meeting ends of :iiistening device comprisingY :i pair of fastening elements, one hxedlysecured in each moitise, sriid fiistoning elements having interlockingknuckles concealed vcithin the members to be joined and :i pin insertedthrough sziid interlocking knuckles to join sfiid members sind removablefrom siiid knuckles Without reliipin inuve movement between saidmembers, said pin and knuckles (To-operating to hold said membersagainst relative movement Without additional connections, the mortisesand fastening elements being of dove-tail formation with the knucklesclosely embracing the pin and the fastening elements provided without-turned margins and the pin being operable upon insertion into saidknuckles to draw the meeting ends off the members together to forni atight joint therebetween.

In Witness whereof, I hereunto subscribe my name this 29 day of March,1926.

CARL C. JENSEN.

